Derailleur hanger, gear mech hanger, dropout replacement for Cervelo, Eddy Merckx bike models: Cervelo Dual 2005-2007 Cervelo R2.5 2005 Cervelo R3 2008-2010 Cervelo R3 SL 2006-2010 Cervelo R3 Team 2006-2007 Cervelo RS 2008-2010 Cervelo S1 2009-2011 Cervelo S2 2009-2014 Cervelo S3 2009-2010 Cervelo SLC SL 2008 Cervelo Soloist 2007-2008 Cervelo Soloist Carbon 2005-2008 Cervelo Soloist Team 2005-2008 Eddy Merckx EMX1 2010 UNION rear derailleur hanger manufactured by Marwi one of the most know manufacturers in the world: Material: Cast aluminium. Bolts included. Marwi catalog number: GH-147 AKA mech hanger, gear hanger